Antenna assembly and manufacturing method thereof, array antenna and manufacturing method thereof, and communication device

Abstract

This application relates to the field of antenna technologies, and in particular, to an antenna assembly. The antenna assembly includes a first antenna array element, a second antenna array element, and a filtering structure. The first antenna array element supports receiving in a first frequency band, and the second antenna array element supports transmitting in a second frequency band. The filtering structure includes at least one of a first filtering structure and a second filtering structure. The first filtering structure is disposed on the first antenna array element, and the second filtering structure is disposed on the second antenna array element. Isolation of the antenna assembly is high.

What is claimed is: 
     
         1 . An antenna assembly, comprising:
 a first antenna array element, wherein the first antenna array element supports receiving in a first frequency band;   a second antenna array element, wherein the second antenna array element supports transmitting in a second frequency band; and   a filtering structure, wherein the filtering structure comprises at least one of a first filtering structure and a second filtering structure, the first filtering structure is disposed on the first antenna array element, and the second filtering structure is disposed on the second antenna array element.   
     
     
         2 . The antenna assembly according to  claim 1 , wherein the first antenna array element further supports transmitting in a third frequency band. 
     
     
         3 . The antenna assembly according to  claim 1 , wherein the first antenna array element and the second antenna array element are disposed in a coaxial manner. 
     
     
         4 . The antenna assembly according to  claim 1 , wherein a coverage area of the first antenna array element and a coverage area of the second antenna array element partially or completely overlap, and a gap exists between an axis of the first antenna array element and an axis of the second antenna array element. 
     
     
         5 . The antenna assembly according to  claim 1 , wherein the first antenna array element is a dipole antenna, a dielectric resonator antenna, or a patch antenna, and the second antenna array element is a dipole antenna, a dielectric resonator antenna, or a patch antenna. 
     
     
         6 . The antenna assembly according to  claim 5 , wherein the first filtering structure comprises a split-ring resonator structure, the first antenna array element is the dipole antenna, the dipole antenna comprises a first feeding unit and one or more dipole arms coupled to the first feeding unit, and at least one split-ring resonator structure is disposed on at least one of the one or more dipole arms. 
     
     
         7 . The antenna assembly according to  claim 6 , wherein the dipole antenna comprises two dipole arms, the two dipole arms are located on a same plane, one first feeding unit is coupled to each dipole arm, two split-ring resonator structures are disposed on each dipole arm, and a slit of each split-ring resonator structure faces an axis of the dipole antenna. 
     
     
         8 . The antenna assembly according to  claim 5 , wherein the first filtering structure comprises a first coupled resonator structure, and the first coupled resonator structure is disposed on the first feeding unit of the dipole antenna. 
     
     
         9 . The antenna assembly according to  claim 8 , wherein the first feeding unit comprises a feeding balun, a feeder, a ground end, and a first dielectric plate configured to support the dipole arm, the feeder is disposed on the first dielectric plate, one end of the feeder is connected to the feeding balun, the feeding balun is coupled to the dipole arm, the other end of the feeder is connected to a power division network, the feeder and the first coupled resonator structure are disposed on one surface of the first dielectric plate, the ground end is disposed on the other surface of the first dielectric plate, and a gap exists between the first coupled resonator structure and the feeder. 
     
     
         10 . The antenna assembly according to  claim 5 , wherein the second filtering structure comprises a short-circuit cavity, the second antenna array element is the patch antenna, and the patch antenna comprises an antenna body, a parasitic patch, and a second feeding unit; and
 one end of the second feeding unit is connected to the antenna body, the other end of the second feeding unit is connected to a power division network, the parasitic patch is located between the antenna body and the dipole antenna, and a gap exists between the parasitic patch and the antenna body, wherein the short-circuit cavity is disposed on a side that is of the parasitic patch and that is away from the dipole antenna, and holes are provided on the parasitic patch and the antenna body, so that the ground end of the first feeding unit in the first antenna array element is electrically connected to a ground end of the second feeding unit.   
     
     
         11 . The antenna assembly according to  claim 10 , wherein the short-circuit cavity is of a cross-shaped structure. 
     
     
         12 . The antenna assembly according to  claim 10 , wherein the patch antenna further comprises a second dielectric plate, the second filtering structure comprises a second coupled resonator structure, the second dielectric plate is disposed on a side that is of the antenna body and that is away from the parasitic patch, both the second feeding unit and the second coupled resonator structure are disposed on the second dielectric plate, the second coupled resonator structure is coupled to the second feeding unit, and a gap exists between the second coupled resonator structure and the second feeding unit. 
     
     
         13 . The antenna assembly according to  claim 5 , wherein the antenna assembly further comprises a baffle plate, and the baffle plate is disposed between the patch antenna and the dipole antenna. 
     
     
         14 . The antenna assembly according to  claim 1 , wherein the antenna assembly is distributed on a metal floor in an array. 
     
     
         15 . The antenna assembly according to  claim 1 , wherein a gap exists between the antenna assembly and an adjacent antenna assembly in a row direction.